Drool alert! S.A.’s Summer Glau graces TV series

The former “Firefly” and “Terminator” star revisits a former role in tonight’s new episode of “Alphas.”

It airs at 7 p.m. on the Syfy Channel. Glau, who was born and grew up in San Antonio before getting her big break when Joss Whedon cast her as a ballerina in “Angel,” reprises the character of Skylar Adams. Skylar is a genius who possesses a mastery of electronics that allows her to create complex devices from random objects in a brief amount of time. In the episode titled “Alphaville,” Dr. Rosen (David Strathairn) and the team of superhumans seek Skylar’s help to decode immortal villain Stanton Parish’s Alpha-enhancing technology.

“Alphas,” in its second season, follows a clandestine group of people with extraordinary mental and physical abilities. Led by preeminent neurologist and psychiatrist Rosen, the unlikely team takes on cases the CIA, FBI and Pentagon are unable to solve. Most of the time, they go head-to-head with criminal Alphas hiding among the normal population.

Glau, known as the nerd’s dream girl, is so popular among sci-fi buffs that she was cast as herself in an episode of “The Big Bang Theory” that had most of the central quartet of guys drooling over her during a train ride.